| ; Test kernel hwasan instrumentation for alloca. |
| ; |
| ; RUN: opt < %s -hwasan -hwasan-kernel=1 -S | FileCheck %s |
| |
| target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64--linux-android" |
| |
| declare void @use32(i32*) |
| |
| define void @test_alloca() sanitize_hwaddress { |
| ; CHECK-LABEL: @test_alloca( |
| ; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress(i32 0) |
| ; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64 |
| ; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20 |
| ; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]] |
| |
| ; CHECK: %[[X:[^ ]*]] = alloca i32, align 16 |
| ; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0 |
| ; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X]] to i64 |
| ; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56 |
| ; CHECK: %[[D:[^ ]*]] = or i64 %[[C]], 72057594037927935 |
| ; CHECK: %[[E:[^ ]*]] = and i64 %[[X1]], %[[D]] |
| ; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[E]] to i32* |
| |
| entry: |
| %x = alloca i32, align 4 |
| call void @use32(i32* nonnull %x) |
| ret void |
| } |
